Internal-combustion engine



July' 1928.

' J. G. VINCENT iNTERNAL COMBUSTION ENGINE Filed April 6. 1922 2 Sheets-Sheet 1 July .10, 1928.

J. G. VINCENT INTERNAL COMBUSTION ENGINE 2 sheets-sheet 2 Filed April 6. 1922 Patented July 10, 1928.

UNITE ,T,

. JEssE-e'vmonNT, or DETROIT, VMICI-IIGAN, Assmnon To P'AoKARnMoToR oAn'ooM- PANY, or IDETROIQY'VM-ICHI'GYAN',

A coRro ATIoN or MICHI N.

INTERNAL-COMBUSTION ENGINE.

; Application fii an rn e,

This invention relates to internal combustionenginesand particularly to the means for lubricating such engines.

One of the objects of the present inven tion is to provide a novel lubrication system for an internal combustion engine.

,Another object of the invention is toprovide an internal'combustion engine with an oil pump supported in its upper-halt and extendingvinto the lower part of the crank point in the crank case.

Another object of the invention is tov mount. all of the pump parts; and accessories in the upper half of the-crankcase whileat the same time making the screen inlet of the pump accessible through the bottom of the lower half of the crank case V Another object of the i'nventionzis to provide, in a crank case havinga itullnscreen 2 across it a pump mounted in the upper part ofthe crank case and extending through "the screen so that the pump inlet is accessible through the lower .wall of the crank case;

Other objects of the invention will appear from the following description'ltaken in con- -nection with the drawings, WhlChUfOIm a part of-this specification,andinwhich: r i -Fig.' 1 is a transverse, vertical section through an engine embodying the invention; Fig.3 2 is: a longitudinal vertical section through the engine shown inFig. 1,"the.sec-

tion' parts beingsubstantially on the line 2 2ofFig.l ;and 1 Fig. 3 isa horizontal'section on the line V J.Referi'ing to. the drawings 10 represents the upper part and 11 the lower part'of an 7 engine crank case,';the.se parts being detachably securedtogether'by a series-of bolts 12.

.In the upper part of thecra'nk case the gine are illustrated inFigs. 1 land 2. I

crank shaft 13- is mounted in bearings Some of the connecting rods 15 of the en- A cam shaft 16 iszalso' supported-in bearings in the upper part of the crank case, one of these bearings being-shown .at 17 in Fig.

1922. Serial No. 549,971.

falls from thevarious bearingsiin the-upper; part of the case. Thisscreen 18 is mounted inthe lower part of the crankcase upon cross battles 19 which in turn are supported on bosses 20 in the lower part of the" crank case being secured thereto by a series of screws 21. The battles 19 are adapted to prevent too: much surging of the oil in the. crank case when the engine is used in an automobile or other moving vehicle. I The lower part of the-crank case is formed witha drain opening i22- and a plug 23. is provided for the-opening; There is also an opening 24 in the bottom Wall of the lower part of the crank case which opening is for the removal of the oil screen .whicliis about to be described In line with: the. opening 24: and of about the same size, is an-opening 25 formed in the large screen l8i i I Forfthe purposeof circulating lubricating oil through the various bearings of themo tor an' oil pump26 is provided. This pump is shown as being of the gear type-driven by a shaft 27 which extends upwardly along? side of the camshaft 16. 1 A worm gear 28 the upper end of this shaft meshes with a worm gear 29 on-the cam shaft. so that the cam shaftfolrives the oilpump. A bear the upperpart 10 of the crankcase, the

pump casting having ears 81 through which bolts 32are passed to thus secure the pump in place. The gears of the puinp are shown at 33inboth Figures 1 and-2. I

The outlet from the pump casing is shown at 34 in Fig. 2 and this 'outletzisconnected by a pipe 35 to anoil manifold 36 which has several bra'nchesf37 'extending to the bearings 14 above described; These branches 37" are detachably secured to the. bearing members. as by nuts 38 and thus the entire inanifold is supported by the bearings. L This; manifold. and the pump may be mounted in place and connected together inftlie crank case withthe lower part -l'l reinoved and, of

course, all of these parts except part'joftlie pump, willbe above the=screen 18 when the lower half of thecrankcase is in place. The pump itself, when the lower part 11 ispositioned, willpass through the opening 125 in the screen 18 thus extending down intothe lower partof thecrank case a considerable distance. The inlet of the pump 26 extends even farther down into the crank case, this inlet being shown particularly in Fig. 2 as formed in a casting 39 which is detachably securedas by the screws 40 to the lower part of the pump 26. This casting extends well down to the bottom of the crank caseand has two vertical passages one of which, marked 41, is the inlet for the pump and the other of which, marked 42, is the passage for the overflow from the pump. This overflow passage is controlled by a spring pressed valve 43, the spring being shown at 44 and an adjusting screw for the spring being shown at 45. A port 46 permits the overflowing oil to pass back into the crank case. This valved overflow will, of course, limit the pressure of the oil in the outlet from the pump 26 and consequently limit the pressure in the oil manifold and the bearings.

The casting 39 above described forms a support for a .screen 47 which is 01'? substantially cylindrical shape, open at the top and closed at the bottom except for a linger opening 48. This screen slides on the support 39 and is held in place thereon by a cover 49 which is detachably connected to the lowerpart 11 of the crank case over the opening 24 by a series 01 bolts 50. This cover 49 is slightly depressed so that, together with the opening 24, it forms a well or depression in thelower partof the crank case so that the oil in the crank case will drain towards that point; The cover 49 may be removed and then the screen 47 may be removed for cleaning. With both the cover and screen off the adjusting screw 45 for the overflow valve maybe turned for adjusting the spring.

Also supported on the casting 39 is a shield or guard 51 which is spaced from and surrounds the screen 47. This shield is also preferably cylindrical and its upper end is secured to a flange 52 formed on the sup-- port 39. Its lower end extends down into the depression formed by the cover 49 and the opening 24 and is slightly above the cover at this point so thatall of the lubricant in the crank case, in passing to the inlet 41 of the pump inside of the screen 47, must pass under the shield 51. Thus there can be no very great collection of sludge or water in the'bottom of the crank case because this heavier material would drain into the depression and pass under the shield 51 to the screen and thence, of course, to the inlet 41 of the pump. Thus any water or acid 7 or other foreign substance that would pass through the screen 47 would be circulated through the bearings of the motor and distilled off. For instance, the oil which escapes from the bearings of the crank shaft is thrown up against the hot pistons and the cylinder walls and any water in the oil would be vaporized and wouldpass off through the crank case vent. The same is true of sulphuric acid that is sometimes found in the oil, either originally or by reason of some of the engine fuel passing down around the pistons into the crank case.

It has been found that such collections of water and sulphuric acid in the crank case are very harmful to the steel parts therein, particularly the carbonized steel parts, and more especially when the motor has been standing for some time. The circulation of this material through the bearings, however, when the motor is hot, distills it of]? and frees the crank case of it. Thus the shield 51 is an important factor in preventing the collection of water and acid and keeping it in circulation through the system as long as there is any of it present.

It will be seen that, in addition to the removability of the screen 47, the support 39 is also removable through the opening 24.

While I have herein described in some detail a specific embodiment of my invention,

which I deem to be newand advantageous and may specifically claim, I do not desire it to be understood that my invention is limited to the exact details of the construction, as it will be apparent that changes may be made therein without departing from the spirit or scope of my invention.

Having thus described my invention, what I claim and desire to secure by Letters Patent is:

1. In an internal combustion engine, the combination with upper and lower crank case parts, of a screen above the bottom of the lower crank case part and extending substantially across the crank case, said screen having an opening therethrough, an oil pump secured to the upper crank case part and extending through the opening in said of a lower crank case part detachably secured to the upper part and forming an'oil supply reservoir, a screen extending substantiallyacross the crank case and secured in the lower crank case part above the bottom thereof, said screen having an opening therethrough, and an oil pump suspended from the upper crank case part and extend ing through said opening in the screen when the lower. crank case part is placed in position.

3. In an internal combustion engine, the combination with theengine crank case, of an oil pump detachably secured to the crank case, a screen support detachably connected to the pump, and a screen slidably mounted on said support.

4. In an internal combustion engine, the combination with the engine crank case, of an oil pump mounted therein, a screen support detachably secured to the oil pump and comprising a conduit forming the inlet conduit of said pump and a screen on said support over said inlet conduit.

5. Inan internal combustion engine, the combination with a pump, of a screen support'detachably connected thereto, said support constituting an inlet and an overflow outlet for said pump, and a screen over said inlet and outlet.

6. In an internal combustionengine, the

- combination with a pump having an inlet and an overflow outlet, of a screen surrounding and enclosing said inletand outlet so that the overflow oil may be drawn into the inlet Without passing through the screen.

7 In an internal combustion engine, the

combination with the crank case thereof, of a pump having an nlet in the crank case,-

having a main outlet to bearings. within the crank case, and having an overflow outi let, and a screen surrounding and enclosing said inlet and said overflow outlet. i i

8 .In an internal combustion engine, the

combination with the crank case, ofa screen arranged in the crank case above the bottom thereof and extending substantially across the crank case, said screen having an opening therethrough, an oil pump mounted in thecrank case and adapted to be extended through said opening when the partslare assembled, and a flange on said oil pump- JESSE G vINCENT, 

